To be honest, I don't get it. I admit that there aren't any of the existing companions that I really think should have been a short person instead. Sure, I've seen the argument for Gale as a gnome and while I don't have anything against it, I don't see it as a necessary change either. The camera argument doesn't make a lot of sense to me because they already have to allow for small characters since you can play one. The only thing that would really have to be added are short on short romance animations and I don't know that that would be enough of a problem to justify it.
From everything I've seen they have at most one short hireling, and that just seems weird to me. I probably wouldn't play one myself, except maybe a Dwarf fighter or cleric, but I know enough other people love them that I'm surprised we don't have the option. I know I would have loved to see Nettie as a possible companion, more so even than Halsin.